Linq Puzzle: How do I convert this foreach to linq syntax?

Question

List<string> nameSpaceSuffixes = GetSuffixes();

foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
        {
            foreach(var suffix in nameSpaceSuffixes)
            {
                if (assembly.GetName().Name.EndsWith(suffix))
                    Register(container, assembly, suffix);
            }
        }

Answer 1

This may not be the most efficient but:

 AppDomain.CurrentDomain
          .GetAssemblies()
          .SelectMany(assembly => nameSpaceSuffixes.Select(suffix =>
                                  new { Assembly = assembly, Suffix = suffix }))   
          .Where(anon => anon.Assembly.GetName().Name.EndsWith(anon.Suffix))       
          .ToList()
          .ForEach(anon => Register(container, anon.Assembly, anon.Suffix);

Answer 2

As a query expression:

var query = from assembly in AppDomain.CurrentDomain.GetAssemblies()
            from suffix in namespaceSuffixes
            where assembly.GetName().Name.EndsWith(suffix)
            select new { assembly, suffix };

foreach (var result in query)
{
    Register(container, result.assembly, result.suffix);
}

I haven't gone down Ani's route of using List<T>.ForEach - I personally prefer to use a normal foreach statement. LINQ is great for the declarative querying; foreach is godo for the imperative action taken on each element.

Note that my query expression is almost equivalent to Ani's dot notation; the C# compiler would use a slightly different overload of SelectMany, that's all. In this particular case I think the query expression is easier to understand; in simpler cases I prefer dot notation.